Interesting boot failure

This is short case history, not a query.

A recent problem with an Athlon processor was described as 'firing up but showing no picture - monitor ok on another pc'.

Internal investigation certainly showed fans turning and the memory tested Ok. However my post card showed no processor activity at all. Substituting a known good Athlon made no difference. Substituting graphics cards made no difference. Battery 3.05 volts - OK.

Finally twigged when I removed the modem yes modem. A recent electrical storm must have shorted the PCI bus via the modem. Remove it and everything else works fine.

The same electrical storm has yielded several other interesting cases if anyone is interested?

Studio T

 

Always interested , studiot, in these weird phenonomens.
It can help when looking at sudden , normally brainracking halts.